20001449 Ver 1_Stormwater Approval_20030128

Michael F. Easley
Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
January 28, 2003
Kevin Vogel, PE
Land Design
223 N. Graham St.
Charlotte, NC 28202
Subject: Catawba Hills
DWQ Project No. 001449
Gaston County
Dear Mr. Vogel:
The Wetlands Unit staff reviewed the stormwater management plans for the subject project and determined that additional
information is necessary to complete the technical review process. The required additional information is as follows:
Village B
The application approved with the Water Quality Certification issued December 4, 2000, indicated that the area
labeled "Village B" would also be for townhomes, and, as such, require that a stormwater management plan shall be
approved before any of the impacts approved occur (per condition no. 2).
2. Temporary Water Quality Pool
The Division review process utilizes the Simple Method for determining the 1 inch storm volume to be controlled.
This method is outlined in NCDENR stormwater Best Management Practices Manual, April 1999. As such, the
temporary storage volume proposed was insufficient.
3. Vegetative Shelf
A vegetative shelf around the perimeter of the pond is required. The shelf shall be gently sloped (6:1 or flatter) and
shall consist of native (volunteer, if desired) vegetation. Please specify this on the engineering plans.
4. Operation and Maintenance Agreement
An operation and maintenance agreement is required. The operation and maintenance agreement must also be
signed by the responsible party and notarized. An example agreement for an extended detention wet pond is
available on line at http://h2o.enr.state.nc.us/ncwetlands/oandm.doc.
5. Worksheets
Completing the enclosed worksheets for each BMP(also available on line at the address below) will greatly
decrease the staff review time.
Division wetlands unit staff will strive to complete a final technical review within 10 working days of receipt of the
requested information. If you have any questions or would like to discuss this project, please contact me at (919) 733-
9584. Also, please note that the NCDENR stormwater Best Management Practices Manual, April 1999, and other
North Carolina Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh., NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
919-733-1786 (phone), 919-733-6893 (fax), http://h2o.enr.state.nc.us/ncwetlands/

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documents and information can be downloaded from the Wetlands Unit web site at
http://h2o.ehnr.state.nc.us/ncwetlands/.
Sincerely,
/G~~~'
Todd St. ohn, PE
Environmental Engineer
cc: Mooresville Regional Office
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